package com.bw.mapper.impl;

import com.bw.entity.Book;
import com.bw.mapper.BookMapper;
import org.springframework.stereotype.Repository;

@Repository
public class BookMapperImpl4 implements BookMapper {



    @Override
    public void addBook(Book book) {
        System.out.println("BookMapperImpl4 开始执行  addBook");
    }
}
